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MidwayUSA has a few reviews about the performance of this bullet in game: https://www.midwayusa.com/product/1010474612?pid=266876
It should expand well as long as the impact velocity is at or above 1800 fps and below about 2800 fps. The good news is that it will be hard to drive these bullets too fast in the Grendel.
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That flat base 129 gr SP is one I like over Lever-evolution. Why we still are not seeing load data on this bewilders me.
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lazyengineer Wrote:"1000 ft-lb and neck shots only" requirement.
Dang, are those deer wearing kevlar scarves?
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09-05-2023, 02:18 PM
(This post was last modified: 09-05-2023, 02:22 PM by Stinky Coyote.)
lazyengineer Wrote:I'm not a fan in Grendel because it's so heavy I can't get my velocity up. My distance to 1000 ft-lb, and my distance to transonic is longer with 123's, than it is with 129's. I will say, I like 129's in the MDRx 6.5 Creedmoor rifle,
Related to that, 6.5 Grendel flight ARC at short range from shorter barrels isn't as flat as 5.56 and 6.5 CM like I'm used to. I got burned by that trying to do neck shots at 100 yards with a 200 yard zeroed Grendel once, where they arced just enough over just enough at 100 yards. The heavier and slower the bullet, the worse that gets in the 200 yard range distance level. (I zero my 5.56 and 6.5 CM rifles at 200, which gives a dead hold impact within 1.5 inches at anything from about 35 yards to 225 yards. Not so much with Grendel, which in that case arcade 3" high at 100 yards, which was just high enough to miss a spine hold on small dear due to a landowners "1000 ft-lb and neck shots only" requirement.
yes most big game hunters can easily live within a 6" max point blank range zero, because the largest kill zone is the most reliable (behind the front shoulder boiler room - lungs/heart, big balloons), a 16.1" grendel 123 is still only about 5.3" mpbr with a 200 yard zero but you have very niche requirements due to your particular landowner ask, you're looking for a 3" mpbr zero which is doable with the grendel and 123's but it would be about a 160 yard zero with a 185 yard mpbr and the 123 is entirely too much bullet for this and will almost certainly waste most of it's energy in the hill side beyond the deer. Very few broadside deer can keep my 123's inside them, almost always pass through as I'm shooting a solid 20" penetration combination even from my 16.1" barrel...so you are correct, a .223 with a frangible lighter bullet that would grenade inside of 10-12" penetration and give you a much further 3" mpbr would be the better niche choice for your niche application...the grendel 123 is way too much formula for deer neck shots, or in your case since he's asking for 1000 ft/lbs then you may need to look at 22-250 or 6 arc with light frangible bullets, you don't want to use the 103/108's in the 6-arc, still way too much formula, get down into the 75 gr v-max type range for the 6mm, be 55 v-max type for a .22-250, that formula will give you the laser beam and lighting drt's for those neck shots on deer to likely 250-300 yards no problem, even a .243 with the varmint loads would be a good choice for that also
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lazyengineer Wrote:I'm not a fan in Grendel because it's so heavy I can't get my velocity up. My distance to 1000 ft-lb, and my distance to transonic is longer with 123's, than it is with 129's. I will say, I like 129's in the MDRx 6.5 Creedmoor rifle,
Related to that, 6.5 Grendel flight ARC at short range from shorter barrels isn't as flat as 5.56 and 6.5 CM like I'm used to. I got burned by that trying to do neck shots at 100 yards with a 200 yard zeroed Grendel once, where they arced just enough over just enough at 100 yards. The heavier and slower the bullet, the worse that gets in the 200 yard range distance level. (I zero my 5.56 and 6.5 CM rifles at 200, which gives a dead hold impact within 1.5 inches at anything from about 35 yards to 225 yards. Not so much with Grendel, which in that case arcade 3" high at 100 yards, which was just high enough to miss a spine hold on small dear due to a landowners "1000 ft-lb and neck shots only" requirement.
If you go 90-110gr, it gets really flat.
75yd zero with the 95gr V-MAX at 2900fps
.3 high at 100yds
-1.6 at 200yds
-4.8 at 250yds with only 4.6 of wind drift 10mph full value
1005ft-lbs at 300yds
90gr TNT at 2900fps (this is the average mv for Federal factory ammo from my 17.6 Grendel) 75yd zero
100yds .3 high
200yds -2 1032 ft-lbs
110gr Sierra Tipped Game King at 2650fps, 50yd zero
100yds 1.3
200yds -0.4
Maintains 1064ft-lbs to 300yds
105gr Sierra BlitzKing, 2800fps, 75yd zero
100yds .3 high
200yds -1.9
1025ft-lbs to 350yds
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6.5 Grendel Reloading Handbooks & chamber brushes can be found here:
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Perfection is the 100 gr. Nosler Ballistic Tips and Partitions. Unobtainium.
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good point LRRPF52, the 95 gr v-max with it's lesser sd and frangible construction moving much quicker would be the best choice for neck shooting deer and having that good long 3" mpbr distance, if grendel for this application that would be the hot ticket
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Stef,
I'm surprised that the prices are that close to what we see in California!
Regarding the 129 gr SP, it is a very good bullet when impacting between 1800 and 2800 fps.
One can get a muzzle velocity of about 2400 fps from an 18" barrel while keeping pressures under about 50,000 psi. It will still be going faster than 1800 fps when it goes past 300 yard.
A 24" barrel can give one about 2600 fps with the 1800 fps mark being reached somwhere past 400 yards.
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For me the perfect bullet is the 120ELD. The 100eld shoots flatter and the 123eld flies farther but the 120 shoots the best and easier to tune in both Grendels. That and they are the most reliable to find localy
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